CN210134944U - Transportation motor control system and heading machine - Google Patents
Transportation motor control system and heading machine Download PDFInfo
- Publication number
- CN210134944U CN210134944U CN201920538256.6U CN201920538256U CN210134944U CN 210134944 U CN210134944 U CN 210134944U CN 201920538256 U CN201920538256 U CN 201920538256U CN 210134944 U CN210134944 U CN 210134944U
- Authority
- CN
- China
- Prior art keywords
- proportional
- reversing valve
- valve
- hydraulic
- proportional reversing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to a boom-type entry driving machine technical field especially relates to a transportation motor control system, including controller and transportation motor, with first hydraulic fluid port working oil circuit that the first hydraulic fluid port of transportation motor is connected and with the second hydraulic fluid port working oil circuit that the second hydraulic fluid port of transportation motor is connected to two delivery outlets of first proportional reversing valve respectively, is neighbouring first hydraulic fluid port working oil of first hydraulic fluid port is on the road with neighbouring be provided with first motor hydraulic fluid port pressure sensor and second motor hydraulic fluid port pressure sensor on the second hydraulic fluid port working oil circuit of second hydraulic fluid port respectively, at first hydraulic fluid port and the parallelly connected second proportional reversing valve that is provided with of second hydraulic fluid port. The utility model discloses still relate to a entry driving machine and this system's control method. The utility model discloses the hydraulic shock that appears when can eliminating the card material prolongs hydraulic component's life.
Description
Technical Field
The utility model relates to a cantilever type entry driving machine technical field especially relates to a transportation motor control system and entry driving machine.
Background
As shown in fig. 1, the transport motor in the boom excavator includes a first transport motor 2 and a blade star motor 3, wherein the number of the first transport motor 2 is one or two and the number of the blade star motor 3 is two according to the transport power of the boom excavator. In field construction, the first conveyor 1 is occasionally subjected to a material blocking working condition, the first conveyor 1 is suddenly stopped during material blocking, the first conveyor driving motor 2 is stopped, and at the moment, strong hydraulic impact occurs in a hydraulic system to damage the first conveyor driving motor 2 and other elements in a hydraulic control system. When the card material appeared in addition, part operating personnel operating equipment made 1 frequent positive and negative impact of first conveyer, expected first conveyer scraper blade will block the stagnation object and strike out, and this kind of violation operation will make hydraulic shock frequently appear, further causes the harm to hydraulic component, has reduced hydraulic component life expectancy. The shovel star wheel motor 3 is similar to the first conveyor driving motor 2 in working condition, and hydraulic impact can be generated, so that the expected service time of the driving motor is greatly reduced.
An original hydraulic control system is shown in fig. 2, a hydraulic control handle 4 controls a hydraulic control proportional reversing valve 5 to reverse, an oil port A, B of the hydraulic control proportional reversing valve 5 is connected with a port of a transport motor A, B, an overflow valve 6 is arranged on the hydraulic control proportional reversing valve A, B and used for protecting the hydraulic system and buffering hydraulic impact, in addition, a Y-shaped neutral position function is selected in the hydraulic control proportional reversing valve 5, and when a transport motor 8 stops, partial hydraulic impact can be reduced by the Y-shaped neutral position function. Through practical tests, when the transportation motor 8 stops rotating, particularly when material jamming occurs, hydraulic impact in an original control system is still large, and damage is caused to the transportation motor 8 and other hydraulic components.
Disclosure of Invention
In order to solve the problem that exists among the prior art, the utility model provides a transportation motor control system and entry driving machine eliminates the hydraulic shock that appears when the card material, prolongs hydraulic component's life.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a transportation motor control system, including controller and transportation motor, with the first hydraulic fluid port working oil circuit that the first hydraulic fluid port of transportation motor is connected and with the second hydraulic fluid port working oil circuit that the second hydraulic fluid port of transportation motor is connected to two delivery outlets of first proportional directional control valve respectively, be provided with first motor hydraulic fluid port pressure sensor and second motor hydraulic fluid port pressure sensor respectively on the first hydraulic fluid port working oil circuit that is close to the first hydraulic fluid port and on the second hydraulic fluid port working oil circuit that is close to the second hydraulic fluid port, be provided with second proportional directional control valve in parallel at first hydraulic fluid port and second hydraulic fluid port;
the controller is used for receiving pressure value signals of the first oil port and the second oil port detected by the first motor oil port pressure sensor and the second motor oil port pressure sensor and controlling the reversing of the first proportional reversing valve and the second proportional reversing valve, so that hydraulic impact and material jamming are eliminated.
Preferably, the first proportional directional valve is a three-position four-way directional valve, and the second proportional directional valve is a two-position two-way directional valve.
Preferably, the first proportional reversing valve and the second proportional reversing valve are electrically controlled proportional reversing valves which are both connected to a controller.
Preferably, the device further comprises an electric control handle and a material eliminating and clamping operation button, wherein the electric control handle and the material eliminating and clamping operation button are respectively and electrically connected with the controller.
Preferably, the first proportional reversing valve is a hydraulic control proportional reversing valve, the second proportional reversing valve is an electric control proportional reversing valve, and the electric control proportional reversing valve is connected to the controller.
Preferably, a first hydraulic control proportional pressure sensor and a second hydraulic control proportional pressure sensor are respectively arranged on a control oil path of the first proportional reversing valve, and are used for detecting the hydraulic proportion of the first proportional reversing valve and transmitting a hydraulic proportion signal to the controller.
Preferably, the hydraulic control system further comprises a third proportional reversing valve, a fourth proportional reversing valve, a first proportional pressure reducing valve and a second proportional pressure reducing valve, wherein the third proportional reversing valve and the fourth proportional reversing valve are electric control proportional reversing valves, and the first proportional pressure reducing valve and the second proportional pressure reducing valve are electric control proportional pressure reducing valves and are connected to the controller.
Preferably, the device also comprises a hydraulic control handle and a material blockage eliminating operation button, wherein one path of the hydraulic control handle passes through a third proportional reversing valve and a first proportional pressure reducing valve, and the other path of the hydraulic control handle passes through a fourth proportional reversing valve and a second proportional pressure reducing valve and is connected with a control oil path of the first proportional reversing valve; the jam elimination material operation button is electrically connected with the controller.
The utility model provides a pair of heading machine, include as above transportation motor control system.
Compared with the prior art, the utility model has the advantages of it is following:
1. when the first conveyor is blocked suddenly, the first motor oil port pressure sensor or the second motor oil port pressure sensor detects a pressure rising signal at one end of the transport motor and then inputs the pressure rising signal to the controller, the controller outputs a control signal to the first proportional reversing valve and the second proportional reversing valve and controls the first proportional reversing valve to return to the middle position, hydraulic oil is prevented from being continuously input into the transport motor and is controlled to be reversed by the second proportional reversing valve, the first oil port and the second oil port of the transport motor are communicated, and the hydraulic oil flows from the high pressure side to the low pressure side, so that hydraulic impact generated by sudden stop of the transport motor is eliminated, and the service lives of a hydraulic element and a matched mechanical element are prolonged.
2. The material blockage eliminating operation button is arranged on the operation table, if the material blockage condition of the first conveyor occurs, the material blockage eliminating operation button is pressed down, the controller executes the operation of automatically eliminating the material blockage, and the situation that the first conveyor is frequently impacted in forward and reverse rotation due to illegal operation of operators is avoided, so that damage is caused to hydraulic elements.
3. On the basis of former cantilever type entry driving machine, add hydraulic component, supply the electrical control procedure, can realize the utility model discloses the effect that expects to reach, simple manufacture, reasonable in design can obtain using well and implement at the scene.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic view of a transport motor of a boom excavator;
FIG. 2 is an electrical schematic of a prior art transport motor hydraulic control system;
fig. 3 is a hardware structure diagram of a transportation motor control system according to a first embodiment of the present invention;
fig. 4 is an electrical schematic diagram of a transport motor control system according to a first embodiment of the present invention;
fig. 5 is an electrical schematic diagram of a transport motor control system according to a second embodiment of the present invention;
fig. 6 is an electrical schematic diagram of a transport motor control system according to a third embodiment of the present invention;
fig. 7 is a flowchart of a case where hydraulic shock is eliminated in a control method of a transport motor control system corresponding to the embodiment;
fig. 8 is a flowchart of eliminating jamming in the control method of the transport motor control system according to the embodiment.
The reference numbers in the figures denote: 1. the system comprises a first conveyor, 2, a first conveyor driving motor, 3, a shovel plate star wheel motor, 4, a hydraulic control handle, 5, a hydraulic control proportional directional control valve, 6, an overflow valve, 7, a controller, 8, a conveying motor, 9, a first motor oil port pressure sensor, 10, a second motor oil port pressure sensor, 11, a first proportional directional control valve, 12, a second proportional directional control valve, 13, an electric control handle, 14, a material blockage eliminating operation button, 15, a display screen, 16, a first hydraulic control proportional pressure sensor, 17, a second hydraulic control proportional pressure sensor, 18, a third proportional directional control valve, 19, a fourth proportional directional control valve, 20, a first proportional pressure reducing valve, 21, a second proportional pressure reducing valve and 22, and a shuttle valve.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
In a first embodiment, as shown in fig. 3 and 4, the transportation motor control system provided in this embodiment includes a controller 7 and a transportation motor 8, where the controller 7 may preferably adopt a PLC controller, a first port working oil path C1 connected to a first port a of the transportation motor 8 and a second port working oil path C2 connected to a second port B of the transportation motor 8 are respectively connected to two output ports of a first proportional directional control valve 11, and forward and reverse rotation of the transportation motor 8 can be achieved by reversing the first proportional directional control valve 11, a first motor pressure sensor 9 and a second motor pressure sensor 10 are respectively disposed on the first port working oil path C1 adjacent to the first port a and on the second port working oil path C2 adjacent to the second port B and are respectively used for detecting oil pressure values of the first port a and the second port B, and a second proportional reversing valve 12 is arranged in parallel at the first oil port A and the second oil port B.
The controller 7 is configured to receive pressure value signals of the first oil port a and the second oil port B detected by the first motor oil port pressure sensor 9 and the second motor oil port pressure sensor 10, and control the reversing of the first proportional directional valve 11 and the second proportional directional valve 12, so as to achieve the purposes of eliminating hydraulic impact and eliminating material jamming.
In an alternative embodiment, the first proportional directional valve 11 is a three-position, four-way directional valve and the second proportional directional valve 12 is a two-position, two-way directional valve. The first proportional reversing valve 11 includes an oil inlet P, an oil return port T, a first working oil port a and a second working oil port B, the first working oil port a and the second working oil port B are respectively connected to the corresponding first oil port a and the second oil port B, and the oil path of the oil inlet P is connected to the hydraulic oil source P0. The first proportional reversing valve 11 and the second proportional reversing valve 12 are electrically controlled proportional reversing valves, are both connected to the controller 7, and are controlled by the controller 7 to reverse the first proportional reversing valve 11 and the second proportional reversing valve 12.
In an optional embodiment, the system further comprises an electric control handle 13, a jam elimination material operation button 14 and a display screen 15, wherein the electric control handle 13, the jam elimination material operation button 14 and the display screen 15 are respectively and electrically connected with the controller 7. The electric control handle 13 is used for controlling the start-stop, the forward rotation and the reverse rotation of the first conveyor 1, and the controller 7 can override the first proportional directional control valve 11 under special conditions. Be provided with card material operating button 14 that disappears on the operation panel, if take place 1 card material operating button 14 that disappears, press card material operating button 14 that disappears, controller 7 carries out the operation of automatic elimination card material, avoids operating personnel's violation of rules and regulations to make 1 frequent positive and negative rotation of first conveyer strike, causes the harm to hydraulic component, can show alarm information on display screen 15.
The transportation motor control system of this embodiment, on the basis of original transportation motor control system, change the hydraulic control proportional directional valve into the electronic control proportional directional valve, the switching-over is carried out after receiving the control signal of controller 7, first motor hydraulic fluid port pressure sensor 9 and second motor hydraulic fluid port pressure sensor 10 have been increased near first hydraulic fluid port A and second hydraulic fluid port B of transportation motor 8, detect the pressure value at transportation motor 8 both ends, and input pressure signal to controller 7, still increased a response time short second proportional directional valve 12 between first hydraulic fluid port working oil circuit C1 and second hydraulic fluid port working oil circuit C2, receive the control signal of controller 7, this proportional directional valve's setting is in order to balance the oil pressure at transportation motor 8 both ends, alleviate violent hydraulic shock. The controller 7 can also control the electric control proportional reversing valve to carry out reversing for a limited number of times, so that the first conveyor 1 is impacted by positive and negative rotation, and stuck objects are removed.
The control method based on the transportation motor control system specifically comprises three conditions:
condition-to-eliminate hydraulic shock
As shown in fig. 7, the electric control handle 13 controls the first conveyor 1 to operate, when the first conveyor 1 is jammed and suddenly stops, the first motor oil port pressure sensor 9 or the second motor oil port pressure sensor 10 detects a pressure rising signal at one end of the transport motor 8 and inputs the pressure rising signal to the controller 7, the controller 7 outputs a control signal to the first proportional directional valve 11, controls the first proportional directional valve 11 to return to a neutral position, thereby preventing hydraulic oil from continuously inputting into the transport motor 8, and simultaneously outputs a control signal to the second proportional directional valve 12, controls the second proportional directional valve 12 to reverse, the first oil port a and the second oil port B of the transport motor 8 are communicated, hydraulic oil flows from a high pressure side to a low pressure side, and thereby eliminating hydraulic impact at one end of the transport motor 8.
According to the signal feedback of the first motor oil port pressure sensor 9 and the second motor oil port pressure sensor 10, after the hydraulic impact is eliminated, the second proportional reversing valve 12 returns to the original position, the first oil port A and the second oil port B of the transport motor 8 are disconnected, meanwhile, the electric control handle 13 returns to the middle position, the controller 7 eliminates the control on the first proportional reversing valve 11, if the electric control handle 13 is still in the state of starting the transport motor 8, the controller 7 continues to execute the previous override control until the electric control handle 13 returns to the middle position, and then the control on the first proportional reversing valve 11 is released.
Situation two operator violation operation
When an operator repeatedly operates the electric control handle 13, the first proportional reversing valve 11 is frequently reversed to enable the first conveyor 1 to get rid of the material clamping working condition, the controller 7 records the operation times, meanwhile, the control mode of the first condition is executed, the controller 7 sets the maximum allowable time limit, and after the limit times are exceeded, if the electric control handle 13 is continuously operated, the controller 7 limits the operation.
Situation three eliminating jamming
As shown in fig. 8, a material jam elimination operating button 14 is arranged on the operating platform, and if a material jam condition of the first conveyor 1 occurs, the material jam elimination operating button 14 is pressed down, and the controller 7 executes an operation of automatically eliminating a material jam, specifically as follows:
if the material jamming occurs in the first conveyor 1, the first motor oil port pressure sensor 9 sends a pressure impact signal, the controller 7 controls the first proportional directional valve 11 to change the direction, the valve core moves to the left position, namely the side of the second motor oil port pressure sensor 10 is filled with oil, the transport motor 8 is controlled to rotate reversely at a small rotating speed, meanwhile, the controller 7 controls the second proportional directional valve 12 to move and open at a small displacement, the second motor oil port pressure sensor 10 detects whether the pressure impact occurs, if the pressure impact occurs, the controller 7 controls the first proportional directional valve 11 to change the direction, the valve core moves to the right position, the transport motor 8 is controlled to rotate forwardly at a small rotating speed, the first motor oil port pressure sensor 9 detects whether the pressure impact occurs, if the pressure impact occurs, the circulation is continuously executed, and if the pressure impact does not occur, the controller 7 automatically stops the circulation control. In the circulation process, the controller 7 records the circulation times, and after the circulation times exceed the preset value, the display gives an alarm and a prompt of 'suggesting that the jammed object is manually cleared' appears.
The specific values of the maximum allowable times, the cycle times, etc. appearing above can be related to the size of the power of the device, the position of the arranged elements, the model of the selected elements, the working environment of the device, etc., and an experienced person can obtain the values according to experiments, but still be included in the protection scope of the present invention.
The present embodiments also provide a heading machine that includes a transport motor control system as described above.
Example two
As shown in fig. 5, a transportation motor control system provided in this embodiment is different from the first embodiment in that the first proportional directional valve 11 of this embodiment is hydraulically controlled and is configured with related control elements, and the first proportional directional valve 11 of the first embodiment is electromagnetically controlled, and other embodiments are substantially similar and similar to each other, and the differences are as follows.
The first proportional reversing valve 11 is a three-position four-way reversing valve, and the second proportional reversing valve 12 is a two-position two-way reversing valve. The first proportional reversing valve 11 is a hydraulic control proportional reversing valve, the second proportional reversing valve 12 is an electric control proportional reversing valve, the electric control proportional reversing valve is connected to the controller 7, and the controller 7 controls the second proportional reversing valve 12 to reverse.
A first hydraulic control proportional pressure sensor 16 and a second hydraulic control proportional pressure sensor 17 are respectively arranged on the control oil path of the first proportional directional valve 11, and are used for detecting the hydraulic proportion of the first proportional directional valve 11 and transmitting the hydraulic proportion signal to the controller 7.
The control elements matched with the first proportional reversing valve 11 comprise a third proportional reversing valve 18, a fourth proportional reversing valve 19, a first proportional pressure reducing valve 20 and a second proportional pressure reducing valve 21, the third proportional reversing valve 18 and the fourth proportional reversing valve 19 are electric control proportional reversing valves, and the first proportional pressure reducing valve 20 and the second proportional pressure reducing valve 21 are electric control proportional pressure reducing valves and are connected to the controller 7.
In an optional embodiment, the system further comprises a hydraulic control handle 4 and a material blockage eliminating operation button 14, wherein one path of the hydraulic control handle 4 passes through a third proportional reversing valve 18 and a first proportional pressure reducing valve 20, and the other path of the hydraulic control handle 4 passes through a fourth proportional reversing valve 19 and a second proportional pressure reducing valve 21 to be connected with a control oil path of the first proportional reversing valve 11; the jam elimination material operating button 14 is electrically connected with the controller 7.
The working principle is as follows:
under the normal condition, the hydraulic control handle 4 controls the first proportional reversing valve 11, when the first conveyor 1 is jammed, the controller 7 receives a pressure impact signal of the first motor oil port pressure sensor 9 or the second motor oil port pressure sensor 10, the controller 7 controls the third proportional reversing valve 18 and the fourth proportional reversing valve 19 to reverse, so that the control oil way is closed, meanwhile, the controller 7 controls the second proportional reversing valve 12 to reverse, and the first oil port A and the second oil port B of the conveying motor 8 are communicated, so that hydraulic impact at one end of the conveying motor 8 is eliminated. According to the signal feedback of the first motor oil port pressure sensor 9 and the second motor oil port pressure sensor 10, after the hydraulic impact is eliminated, the second proportional directional valve 12 returns to the original position, and the first oil port A and the second oil port B of the transport motor 8 are disconnected.
The material blockage eliminating operation button 14 is arranged on the operation table, if the material blockage eliminating operation button 14 is pressed down when the material blockage working condition of the first conveyor 1 occurs, the controller 7 automatically executes the operation of eliminating the material blockage, the specific implementation mode is similar to that in the first embodiment, and the difference is that after the material blockage eliminating operation button 14 is started, the controller 7 controls the third proportional reversing valve 18 and the fourth proportional reversing valve 19 to reverse, the oil way of the hydraulic control handle 4 is cut off, the controller 7 outputs control signals to the first proportional pressure reducing valve 20 and the second proportional pressure reducing valve 21, and the reversing of the second proportional reversing valve 12 is controlled through the first proportional pressure reducing valve 20 and the second proportional pressure reducing valve 21.
EXAMPLE III
As shown in fig. 6, the present embodiment is substantially the same as the first embodiment, except that a shuttle valve 22 is disposed in parallel at the first oil port a and the second oil port B of the transport motor 8, an oil outlet of the shuttle valve 22 is connected to the working oil port a1 of the second proportional directional valve 12, and an oil inlet P1 of the second proportional directional valve 12 is connected to an oil tank. The shuttle valve 22 here acts as a quick switch.
The utility model discloses only expounded the control system of first cargo airplane driving motor 2, shovel board star gear motor 3 also is applicable to the control thought that the utility model discloses a describe.
The foregoing shows only the preferred embodiments of the present invention, and it will be understood that modifications and decorations can be made by those skilled in the art without departing from the principles of the invention, and that such modifications and decorations are also considered to be within the scope of the invention.
Claims (9)
1. A transport motor control system is characterized by comprising a controller and a transport motor, wherein a first oil port working oil path connected with a first oil port of the transport motor and a second oil port working oil path connected with a second oil port of the transport motor are respectively connected to two output ports of a first proportional reversing valve;
the controller is used for receiving pressure value signals of the first oil port and the second oil port detected by the first motor oil port pressure sensor and the second motor oil port pressure sensor and controlling the reversing of the first proportional reversing valve and the second proportional reversing valve, so that hydraulic impact and material jamming are eliminated.
2. The haulage motor control system of claim 1, wherein the first proportional reversing valve is a three-position, four-way reversing valve and the second proportional reversing valve is a two-position, two-way reversing valve.
3. The haulage motor control system of claim 2, wherein the first and second proportional reversing valves are electronically controlled proportional reversing valves that are each connected to a controller.
4. The haulage motor control system of claim 3, further comprising an electrical handle and a jam elimination button, the electrical handle and the jam elimination button being electrically connected to the controller, respectively.
5. The haulage motor control system of claim 2, wherein the first proportional reversing valve is a hydraulically controlled proportional reversing valve and the second proportional reversing valve is an electrically controlled proportional reversing valve, the electrically controlled proportional reversing valve being connected to a controller.
6. The transportation motor control system according to claim 5, wherein a first hydraulic-control proportional pressure sensor and a second hydraulic-control proportional pressure sensor are respectively provided on control oil passages of the first proportional directional control valve, and are configured to detect a hydraulic proportion of the first proportional directional control valve and transmit a hydraulic proportion signal to the controller.
7. The transport motor control system of claim 5, further comprising a third proportional reversing valve, a fourth proportional reversing valve, a first proportional reducing valve, and a second proportional reducing valve, wherein the third proportional reversing valve and the fourth proportional reversing valve are electronically controlled proportional reversing valves, and the first proportional reducing valve and the second proportional reducing valve are electronically controlled proportional reducing valves, both connected to the controller.
8. The transportation motor control system according to claim 7, further comprising a hydraulic control handle and a material blockage eliminating operation button, wherein one path of the hydraulic control handle passes through the third proportional reversing valve and the first proportional pressure reducing valve, and the other path of the hydraulic control handle passes through the fourth proportional reversing valve and the second proportional pressure reducing valve and is connected with a control oil path of the first proportional reversing valve; the jam elimination material operation button is electrically connected with the controller.
9. A heading machine comprising a transport motor control system as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920538256.6U CN210134944U (en) | 2019-04-19 | 2019-04-19 | Transportation motor control system and heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920538256.6U CN210134944U (en) | 2019-04-19 | 2019-04-19 | Transportation motor control system and heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210134944U true CN210134944U (en) | 2020-03-10 |
Family
ID=69703666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920538256.6U Active CN210134944U (en) | 2019-04-19 | 2019-04-19 | Transportation motor control system and heading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210134944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056367A (en) * | 2019-04-19 | 2019-07-26 | 中铁工程装备集团隧道设备制造有限公司 | Transport the control method of motor control system, development machine and the system |
-
2019
- 2019-04-19 CN CN201920538256.6U patent/CN210134944U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056367A (en) * | 2019-04-19 | 2019-07-26 | 中铁工程装备集团隧道设备制造有限公司 | Transport the control method of motor control system, development machine and the system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1676964B1 (en) | Travel control device for excavators | |
| EP0402474B1 (en) | Service valve circuit in a hydraulic excavator | |
| US9328757B2 (en) | Hydraulic system for work machine | |
| CN103339387B (en) | For the oil hydraulic pump of construction plant | |
| EP1760326B1 (en) | Hydraulic controller for working machine | |
| CN104088830B (en) | The hydraulic system and its pilot-operated type control valve of a kind of crane | |
| EP2933386B1 (en) | Construction machine | |
| CN106051145A (en) | Vehicle door opening walking forbidding system | |
| US4317466A (en) | Hydraulic drive circuit for load-handling machines | |
| US20160040395A1 (en) | Front attachment control system | |
| CN210134944U (en) | Transportation motor control system and heading machine | |
| CN110500343A (en) | Excavator dozer blade hydraulic system | |
| CN109563695B (en) | Control valve for excavator and excavator | |
| EP2058270B1 (en) | Electrohydraulic lifting device | |
| JP4100690B2 (en) | Hydraulic circuit for optional equipment for heavy equipment using spool for boom merging | |
| CN106151147B (en) | Hydraulic system, control method thereof and machine comprising hydraulic system | |
| US10626986B2 (en) | Hydraulic motor drive system for controlling high inertial load rotary components | |
| CN110056367A (en) | Transport the control method of motor control system, development machine and the system | |
| EP2910796A1 (en) | Control valve device with a float position | |
| JP5489511B2 (en) | Construction machinery | |
| CN205446286U (en) | Novel two accuses of variable plunger -type fuel pump device | |
| CN110966274B (en) | Hydraulic locking oil way, engineering machinery hydraulic system and control method thereof | |
| CN108909832B (en) | Steering hydraulic system and loader | |
| CN113027836A (en) | Movable hydraulic rescue system and walking power station of open-air drilling machine | |
| SE1300670A1 (en) | System of attachment brackets to check its locking position |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |